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M. SOHOENPELD. STITGHIADJUSTING MECHANISM FOR EMBROIDERING MACHINES.

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M. SCHOENFELD. STITCH ADJUSTING MEGHANISM FOR BMBROIDERING MACHINES. No.540,462.

Patented June 4, 1895.

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M. SGHOENFELD. STITGH ADJUSTING MECHANISM FOR EMBROIDBRING MACHINES.

No. 540,462 PatentedJu ne 4, 1895.

UNITED STA ATENT (FFICE.

MORRIS SCHOENFELD, OF RORSOHAOH, SW ITZERLAND.

STITCH-ADJUSTING MECHANISM :FOR EMBROIDERING MACHINES.

SPECIFICATION forming part of Letters. Patent No. 540,462, dated June 4,1895. Application filed Dfltember l L Serial No. 414,130. (No model.)Patented in Germany November 20, 1891, T

T0 at whom it may concern: Beitkuown that I, MORRIS Sononnnnnma citizenof the United States'of America, residing at Rorschach, Switzerland,have invented certain new and useful Improvements in AutomaticStitch-Adjusting Apparatus for Embroidering-Machines, (for which I haveobtain ed Letters Patent in Germany, No. 63,946, dated November 20,1891,) ofwhich the following is a specification.

This invention relates to improvements in embroidery-machines and theobject of my invention is to control and regulate the movements of thefabric-holding frame of an embroidery-machine' by means of a strip ofpaper, fabric or like material provided with holes in accordance withthe pattern to be reproduced. v

The invention consists in mechanism operated from the embroidery-machinedriving shaft and controlled by a pattern sheet or strip having holesfor receiving pins which at times are engaged by tappet screws moved byswinging arms from which motion is transmitted to the tambour frame,said motions being up or down or to the right or left in any desiredorder as may be necessary so as to shift the tambour framesuccessivelyin such a manner that any desired pattern can be embroideredby the machine on the fabric held on the tambour frame.

The invention also consists in the construction and combination of partsand details as.

will be fully described and set forth hereinafter and finally pointedout in the claims.

In theaccompanyingdrawings, Figure l is a front elevation of my improvedattachment and of the end part of an embroidery-machine.

Fig. 1 is a plan view. Fig. 2 is a side view of my improved patternattachment. Fig. 2

is a side view, in section, on the line 1/ 'y' of i a reciprocatingmotion. rigidly connected'with the three racks e a e diagrammaticalviewsillustrating the movements of the parts.

' Similar letters and numerals of reference indicate like parts in allthe figures.

The apparatus is operated from the disk B,

mounted on the main shaft A of the embroidery machine, which disk bymeans of the connecting-rod O oscillates the lever D "and the shaft arigidly connected therewith. (See Figs. 1*,2, and 2 A second arm dof theshaft (1. transmits these oscillating movements by means of the rod 0 toa slide-piece 0' (see j Figs. 2 5, 5 and 5 which slide-piece c is guidedby suitable guides c 0 so as to have The slide-piece c is which, asshown in Figs. 1, 2 5, 5 and 5 iengage the three cog-wheels f, f f thatare mounted loosely on the vertical shaft g fixed on the frame Nof theapparatus.v (See fFigs. 1 and 2 The rack e engages its cor- :respondingcog-wheel f on that side of the shaft g opposite the one at which theracks 5e e engage their cog-wheels, so that the movement of theslide-piece 0" causes the :cog-wheel f to vrotate in reversed directionto that in which the cog-wheels f and f are @rotated by their racks eand 6 ;wheels f and f ,-whicl1 are turned in the :same direction bytheir racks e'and e engage these wheels on the same side of the shaft g{The cog-wheels h and 77. Figs. 3, 5, 5 and 5", fare rigidly connected,with the co -wheelsf and f which cog-wheels h k transmit to the jracks iand '5 and their connecting-piecei (Figs 8 and 4) a correspondingreciprocating {-motion when the slide-piece c is moved. Theconnecting-piece i is further provided with four adjustable tappets It10 10 and (Fig. 6}, I which can be adjusted to project more-or less,from the connecting-piece i by means of suitable threads, and whichtappets during the movements of the connecting-piece i can act on fourcorresponding pins Z Z l and Z The cog-.

paper or sheet, it is pressed by its spring into the same and moves tothe front, whereby it is moved out of the path of movement of the tappetk, which can now pass by the same without acting on it. (See Fig. 6.)Each pin Z Z Z and Z is connected with one of the racks m m m and m,which slide in the guides M on the fixed shaftg and which racks engagethe loose cog-wheels n n n n on the shaft g, and on the hubs of saidcog-wheels swinging carrier-arms o o o are fastened, which carry thepivoted pawls g g q, which are pressed by springs against theratchet-wheels E, E, F and F respectively (Figsti and 4), as will be setforth hereinafter. If one of the pins (P, for example) is pushed alongby the tappet k it carries along the rack m and thereby moves or turnsthe cog-wheel n whereby the carrier arm 0 is moved from its initialposition until the pin l drops into one of the holes of the patternpaper or chart P. At this moment the tappet it passes over the pin 1 andthe arm 0 remains at rest and the pawl g drops under the action of itsspring in engagement with the teeth of its ratchetwheel. Thecog-wheelsf'f are also provided with arms 8 s and the cog-wheel f isprovided with the two arms .9 and .5 which carry screws s", Fig. 4,which when the arms swing strike against wings of the pawls q (1 g and(1 The motion is transmitted in the apparatus in such a manner that thearms .9 s s and s at the same time describe a greater path than thecarrier-arms o 0 o and 0 so that during the forward motion of theslide-piece i the arm 3 will swing back farther than the arm 0 which isheld, as its pin has dropped into one of the holes of the pattern chartor paper. Accordingly as this stopping takes place sooner or later thesize of the movement of the embroidery frame is controlled. If duringthe return motion of the piece 0' the racks e e and e begin their returnmovement, the arm 3 for example, strikes at a certain fixed position thepawl g of the carrierarm 0 and the latter and also a ratchet-wheelengaged by said pawl g is swung in the direction of the movements of thehand of the clock back to the starting position of the swinging arm.

The above mentioned ratchet-wheels work in pairs with each other, and ofthe pair E E one is at each side of the toothed wheel E and of the otherpair F F one is at each side of the toothed wheel F and rigidlyconnected therewith. The toothed wheels E and F can turn on the disks Eand F", that are rigidly connected with the axle G. The ratchetwheels Eand E which are firmly connected with the opposite sides of the toothedwheel E, have their teeth inclined in the opposite direction, as shownin Fig. 4, so that the toothed wheel can turn either to the right or tothe left, according as the pawl q is engaged with the ratchet-wheel E orthe pawl g is engaged with the ratchet-wheel E In an analogous mannerthe ratchet-wheels F and F are arranged in relation to the toothed wheelF.

If, for example, as shown in Fig. 4, the pawl g is engaged with theratchebwheel E and is pushed forward by the carrier-arm s and theratchet-wheel E and the toothed wheel E is to be turned, the second pawlq must be disengaged from the ratchet-wheel E, which is accomplished bythe lug H fixed on the frame, which lug carries at the same height asthe pawl q aspring-pin t. Corresponding springpins are also arranged forthe other pawls; forexample, the spring-pin t for the pawl Fig. 4. Ifthe arms 8 s s and s all swing back until their pawls g g g strikeagainst the lug H, that is, until the spring-pins 15' and t the, arepressed back into their sockets, then all the pawls g Q2 g g are pressedby their springs on the corresponding ratchetwheels and thereby thetoothed wheels E and F are held at absolute rest. As soon as one of thearms, for example, 8, (Fig. 4,) is moved from its corresponding pawl qthe corresponding spring-pin t is pressed by its spring to the front andthrows back the pawl of the arm that has remained at rest and thusdestroys the connection between the pawl q and the ratchet-wheel E, sothat the ratchet-wheel E can freely move and turn the toothed wheel E.The two toothed wheels E and F engage the cog-wheels I and 1 of whichthe former is rigidly secured on the shaft I, whereas the latter ismounted loosely on the shaft I and engages the cog-wheel K of thespindle K. By the turning of the spindle K a support K is movedvertically, said support K carryinginsuitable bearings thehorizontalspindle L on the end of which a bevel cog-wheel L is fixed andwhich engages and is rotated by the bevel cog-wheel I that is so mountedon the shaft las to turn with the same by means of aspline, so that saidwheel 1 can be shifted on the shaft. Thereby the nut M mounted on thespindle L is adjusted horizontally, which nut carries the embroideryframe 0.

The not M and the embroidery frame perform a movement which is theresultant of the movements of the two toothed wheels E and F, that is,amovement corresponding to the distance between the holes of the patternpaper. The connection N between the nut M and the embroidery frame 0 canbe disconnected by raising the cover of the hearing, so that theembroidery frame can be shifted independently of the above describedmechanism, for performing certain operations without requiring anychange on the above described apparatus.

The pattern chart or paper P (Figs. 1, 1 and 2) is rolled on a Woodenroller Q, and is guided to the roller R and to the roller S, upon whichit is again rolled. If the pattern has been embroidered, the patternpaper or chart is wound back around the roller P, the cord 19 passingover guide-rollers 'r and kept taut by a weight 19 serving for thepurpose of keeping those parts of the pattern chart or paper that arenot operating taut on the rollers P and 'S.- For the purpose ofprotecting lever to on the shaft a (Fig. 2), which lever by means of therod 11. and the pawl 11. turns a ratchet-wheel connected with the rollerB. By means of the lever 1;, also mounted on the shaft a, the rod o andthe pawl 0 a wheel to is operated periodically, whereby by means of thelevers w and w the pattern chart or paper 13 is brought at the propertime in contact with the pins l, Z Z and Z and moved from the samerespectively for the purpose of protecting said chart fromjundue wear.In the lever d (Figs. 2 and 2), which operates the slidepiece 0', thepivot d of the rod 0 can be adjnsted and the stroke of the entiremechanism thus changed, whereas the movements of the pattern chartpremain the same. For example, if a pattern is to be embroidered thatonly has short stitches, then thestroke of the racks c c 0 can bedecreased, and thus the number of strokes increased without requiringthe mechanism of the apparatus itself to have greater speed in relationto the distance to be traveled; in other words, for small stitches theapparatus can make a greater number in the same time and for largerstitches-it makes a less number in the same time. v

The operation is as follows: The slide a with its three racks and wheelsf f f is reciprocated at regular intervals. Thereby the arms ss ssflwith their lugs s are swung and the connecting-piece @with itstappets, is reciprocated. These tappets 7t 70 k 10 move the pins Z Z 'ZZ along and swing the pawls. Figs. 1 and 1 show the arrangement of theholes in the pattern paper; and 1 corresponds to the movement to theright, 2 to the left, 3 upward, and 4 downwardrand it is evident thatoftwo holes that represent opposite movements one must be directly un- 7der the starting position of its pin and the other must be a greater orless distance away from the first hole;'that is, from the startingposition of the pin. The first kind of holes will therefore always be inone row and the second kind corresponding to the stitch will havecorresponding positions to theleftand in any suitable manner and withoutdepending upon the subdivisions ofthe stitch-regulating devices usedheretofore. By this arrangement of the holes'it is desired to accomplishthe turning of one of the pair of carrierarms 0, 0 or the pair 0 0 whilethe other remains stationary, for, at the moment that the turning of oneof said arms begins the pattern paper or chart 10 is pressed by thedevices previously described against the pins:

1' Z and Z? Z and thereby a tappctis moved into the corresponding holeof the pattern chart by the two pairs of pins Z l and Z Z. Thus themovement of the corresponding rack of the carrier-arm is stopped fromthe start, so that only the movements 1 or 2, and 3 or 4:, Figs. 1 and3, can take place. These movements of the carrier-arms 0' 0 and the arms8' s are shown diagrammatically in Figs. 7 to 9. Fig. 7 shows a positionafter the connecting piece 7) has arrived at its end position in beingpushed over the pattern chart or paper. The arms 8 s with their lugs sare also in their end position, whereas the carrier-arm 0 by means ofits pin Z engaging in the corresponding hole in the pattern chart, islocked in its desired position. The carrier-arm 0' could perform nomovements whatever, as at the beginning of the operation it is held byits pin that has dropped into one of the holes, whereas at the same timeits pawl has been disengaged from the teeth of a correspondingratchet-wheel E by the pin 25. (See Fig. 4.) Fig. 8 shows the returnmovement. The arm 3 turns freely, the arm s strikes, according to thepattern, sooner or later against the carrier-arm 0 and turns theratchet-Wheel E until the two arms .9 s arrive at the startingpositionthat is, until the arm .9 strikes against the carrier-arm o'thepawl q and presses back the pin 15', permitting the pawl to engage theratchet-wheel E, whereby the toothed wheel E, which was formerly movedin the same direction as the arm .9 is now locked. The toothed wheel Ein this case transmitted the movement to the nut M to the embroideryframe 0 in the direction 2, that is, moved the same to the left. Thetoothed wheel F operates in a similar manner, and if the same during theleft movement that has just occurred is turned in the direction of theratchet-wheel F the movementsof the embroidery frame will be 2 and 3,that is, to the ,left and upward.

Havingthus described my invention, what I claim as new, and desire tosecure by Letters Patent, is

- 1. The combination, with an embroiderymachine tarnbour-frame, ofmechanism for shifting the same vertically and horizontally, gearing foroperating said mechanism, pins connected with said gearing and foroperating the same, means for shifting said pins in a plane parallelwith the surface of the patternsheet or strip and in contact with thesame, and a pattern-sheet or strip provided with holes into which saidpins can pass so asv to avoid the shifting means, substantially as setforth.

2. The combination, with an embroidery machine tambour-frame, ofmechanism for shifting said frame vertically and horizon tally, gearingfor: operating said mechanism arms connected with the gearing andprovided with a series of pins, a reciprocating-frame having projectionsfor engaging and shifting said pins in a plane parallel to the surfaceof a pattern-sheet or strip and in contact with the same, and a movablepattern-sheet or strip provided with holes into which said pins can passso as to avoid the projections of said reciprocating-frame,substantially as set forth.

3. The combination, with an embroidery machine tambour frame, ofmechanism for shifting the frame vertically and horizontally, cog-wheelsfor operating said mechanism, ratchet-wheels connected in pairs withsaid cog-wheels, swinging arms, carrying pawls for engaging saidratchet-wheels, cog-wheels formed on said swinging arms, reciprocatingracks for engaging said cog-wheels, movable pins on said racks, amovable pattern sheet having holes into which the pins, when moved oversaid pattern sheet can pass, mechanism for moving the pattern-sheet anda reciprocating frame having projections for acting on said pins, so asto cause them to pass over the pattern sheets, substantially as setforth.

4. The combination, with an embroiderymachine tambour-frame, ofmechanism for moving said tambour-frame vertically and horizontally,cog-wheels for operating said mechanism, two ratchet-wheels havingopposite teeth, for each cog-wheel, a swinging-1ever for eachratchet-wheel, a pawl on each lever, a cog-wheel formed on each lever, arack engaging each cog-wheel, a movable pin held in the end of eachrack, a movable patternsheet or strip having holes into which the pinscan pass, mechanism for moving said patternsheet or strip, and areciprocating-frame having projections that can act on the pins,substantially as set forth.

5. The combination, with an embroidery machine tambour-frame, ofmechanism for moving said frame vertically and horizontally, cog-wheelsfor engaging and driving said mechanism, two ratchet-wheels havingopposite teeth at opposite sides of each cog-wheel and connectedtherewith, a lever for each ratchet-wheel, a pawl on the end of eachlever,a cog-wheel formed on each lever, a rackbar engaging each of saidcog-wheels, a movable pin in the outer end of each rack-bar, a movablepattern-sheet or strip provided with holes into which said pins canpass, mechanism for shifting the pattern-sheet, a reciproeating-framehaving projections that can act on the pins and the rack-bars, swingingarms that can act on the pawls, cog-wheels formed on said swinging arms,rack-bars engaging said cog-wheels,and a reciprocating-frame with whichsaid rack-bars are connected, substantially as set forth.

6. The combination, with an embroiderymachine tambour-frame, ofmechanism for shifting the tambounframe horizontally and vertically, twocog-wheels engaging said mechanism, two ratchet-wheels having oppositeteeth, connected with each cog-wheel, a swinging arm for eachratchet'wheel, a pawl on each swinging arm, a cog-wheel formed on eachswinging pawlarm, a rack-bar engaging each cog-wheel, a movable pin heldon the outer end of each of said rack-bars, a pattern-sheet or striphaving holes through which the pins can pass, mechanism for moving thepatternsheet or strip, a reciprocating cross-piece having projectionsthat can act on the pins, a reciprocating-frame, rack-bars on saidframe, cog-wheels with which said rack-bars engage, an arm on eachcog-wheel, a projection on the end of each arm, which projection can acton the pawls of the ratchet-wheels, and springstops against which thepawls can strike, substantially as set forth.

7. The combination, with an embroidery machine tambonr frame, ofmechanism for moving the same horizontally and vertically, gearing foroperating said mechanism, rackbars engaging said gearing, pins on saidrackbars, a movable pattern-sheet or strip having apertures into whichthe pins can pass, means for moving said pins over the pattern-sheet, areciprocating pin provided with projections that can act on said pins onthe rack-bars for moving them over the pattern-sheet or strip and arocking lever for pressing the pattern sheet or strip against the pinsfor the purpose of bringing them into the path of the reciprocatingframe, substantially as set forth.

In testimony whereof I hereunto sign my name, in the presence of twosubscribing witnesses, this 3d day ofNovember, 1891.

MORRIS SGHOENFELD.

Witnesses:

S. H. M. BYERS, JOSEPH SIMON.

